Check that the frequencies / bands your phone has for 5G is compatible to what your chosen network uses @Members_p13ex3Q
You can check this by using sites such as gsmarena.com and Google Searching what your network uses.
Gsmarena says your phone uses these 5G bands > 1, 3, 5, 7, 8, 20, 28, 38, 40, 41, 66, 77, 78 SA/NSA/Sub6
If they match then your network may need to provision your account for 5G.
You might be able to retest the sim by placing it in another mobile phone that has 5G.
If i can be of any further help please don't hesitate to ask 😎
Daily Driver > Samsung Galaxy s²⁴ Ultra 512Gb ~ Titanium Black.
The advice I offer is my own and does not represent Samsung’s position.
I'm here to help. " This is the way. "
